Minor reword for consistency

Author: javiereguiluz

components/phpunit_bridge.rst

@@ -447,8 +447,7 @@ The script writes the modified PHPUnit it builds in a directory that can be
 configured by the ``SYMFONY_PHPUNIT_DIR`` env var, or in the same directory as
 the ``simple-phpunit`` if it is not provided.
 
-It's also possible to define the environment variable in the
-``phpunit.xml.dist`` file.
+It's also possible to set this env var in the ``phpunit.xml.dist`` file.
 
 If you have installed the bridge through Composer, you can run it by calling e.g.:
 
@@ -461,15 +460,14 @@ If you have installed the bridge through Composer, you can run it by calling e.g
     Set the ``SYMFONY_PHPUNIT_VERSION`` env var to e.g. ``5.5`` to change the
     base version of PHPUnit to ``5.5`` instead of the default ``5.3``.
 
-    It's also possible to define the environment variable in the
-    ``phpunit.xml.dist`` file.
+    It's also possible to set this env var in the ``phpunit.xml.dist`` file.
 
 .. tip::
 
     If you still need to use ``prophecy`` (but not ``symfony/yaml``),
     then set the ``SYMFONY_PHPUNIT_REMOVE`` env var to ``symfony/yaml``.
 
-    It's also possible to set this variable in the ``phpunit.xml.dist`` file.
+    It's also possible to set this env var in the ``phpunit.xml.dist`` file.
 
 Code coverage listener
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